[Tutor] TypeError: 'str' object is not callable

[Alan Gauld]

> > TypeError: 'str' object is not callable
>
> I think what you mean to do in your code is call the os.exit
function,
> as opposed to the string named "exit" in the built-ins.

Or better still raise the SystemExit exception which automatically
ensures all the correct exit hooks are called and doesn't need any
module involvement.

Alan g.